WO2019037592A1

WO2019037592A1 - Draught fan and air conveying equipment

Info

Publication number: WO2019037592A1
Application number: PCT/CN2018/099094
Authority: WO
Inventors: 周红; 黄顺巧; 满超
Original assignee: 重庆通用工业(集团)有限责任公司
Priority date: 2017-08-22
Filing date: 2018-08-07
Publication date: 2019-02-28
Also published as: CN107327421B; CN107327421A

Abstract

Provided are a draught fan (100) and an air conveying equipment (200). The draught fan (100) comprises a shell (10), an air inlet box (20), a rotation shaft (40), an impeller (50) and a flow guiding plate (30). An axial channel (111) is formed in the shell (10). The shell (10) is provided with an air outlet (121). The air inlet box (20) is fixed to the outer side of the shell (10). A radial channel (22) is formed in the air inlet box (20). An air inlet (21) is formed on the top of the air inlet box (20). An outlet (25) is formed on a side wall of the air inlet box (20). The rotation shaft (40) is located in the axial channel (111) and extends into the radial channel (22). The flow guiding plate (30) is arranged in the radial channel (22) at the bottom of the air inlet box (20), and accordingly two cavities can be formed in the inner side of the bottom of the air inlet box (20). After gas inflow, gas can be scattered at the bottom of the air inlet box (20) through the flow guiding plate (30), the flowing uniformity of gas in the outlet of the air inlet box (20) is improved, and flowing turbulence caused by stacking and congestion of a large amount of gas at the bottom of the air inlet box (20) is avoided.

Description

Fan and air supply device

Technical field

The invention relates to the technical field of wind turbines, in particular to a fan and a wind conveying device.

Background technique

For fans that need to access the elbow, a fan box is usually installed in the fan to improve the uniformity of gas flow. Under normal circumstances, the rotating shaft in the fan will be inserted into the air inlet box. When the rotating shaft drives the impeller to rotate, the rotation will affect the flow of gas in the air inlet box. Under the influence of the rotating shaft, the bottom of the air inlet box will form a vortex, resulting in the air inlet box. The flow of the gas at the outlet is not uniform, resulting in a decrease in fan efficiency.

Summary of the invention

It is an object of the present invention to provide a fan to improve the problem of uneven flow of gas at the outlet of the inlet box.

It is an object of the present invention to provide a wind dissipating device to improve the problem of uneven flow of gas at the outlet of the inlet bellows.

The present invention is implemented as follows:

Based on the above first object, the present invention provides a fan comprising a casing, a wind inlet box, a rotating shaft, an impeller and a deflector;

An axial passage is formed inside the casing, and an air outlet is arranged on the casing, and the air outlet and the axial passage are connected by the impeller;

The air inlet box is fixed on the outer side of the casing, and a radial passage is formed inside the air inlet box. The top of the air inlet box is provided with an air inlet communicating with the radial passage. The side wall of the air inlet box is provided with an outlet, and the radial passage and the axial passage are connected through the outlet. ;

The rotating shaft is rotatably supported in the air inlet box, the rotating shaft is located in the axial passage, and the rotating shaft extends into the radial passage;

The impeller is disposed outside the rotating shaft, and the impeller is located in the housing;

The baffle is disposed at the bottom of the air inlet box, and the baffle is disposed in the radial passage so that two chambers are formed inside the bottom of the air inlet box.

Further, the baffle is fixedly connected to the air inlet box, and the two chambers are respectively a first chamber and a second chamber, and the first chamber is larger than the second chamber.

Further, the baffle is slidably coupled to the air inlet box, and the baffle sliding relative to the air inlet box can change the size of the first chamber and the second chamber.

Further, the air inlet box body and the bottom plate disposed at the bottom of the box body, the box body includes a first panel, a first side panel, a second panel and a second side panel which are sequentially connected end to end, and the first panel is fixed to the housing. The outlet is disposed on the first panel, and the second panel is disposed obliquely with respect to the first panel. The distance between the top end of the first panel and the top end of the second panel is greater than the distance between the bottom end of the first panel and the bottom end of the second panel.

Further, the second panel includes a first plate body and a second plate body arranged up and down, the top end of the second plate body is connected to the bottom end of the first plate body, and the bottom end of the second plate body is connected to the bottom plate;

The distance from the top end of the first plate body to the first panel is greater than the distance from the bottom end of the first plate body to the first panel; the distance from the top end of the second plate body to the first panel is greater than the bottom end of the second plate body to the first The distance of the panel.

Further, the first side plate is disposed obliquely with respect to the second side plate, and the distance between the top end of the first side plate and the top end of the second side plate is greater than the distance between the bottom end of the first side plate and the bottom end of the second side plate.

Further, the axis of the rotating shaft is parallel to the plane in which the deflector is located.

Further, the air inlet box is vertically disposed to the outside of the casing, and the deflector is vertically disposed in the radial passage.

Further, the air inlet box is two, and the two air inlet boxes are symmetrically distributed on both sides of the housing in the axial direction of the rotating shaft.

Based on the above second object, the present invention provides a wind conveying device comprising an elbow and the above-mentioned fan, and the elbow is connected to the air inlet of the air inlet box.

The beneficial effects of the invention are:

The invention provides a fan. During operation, the rotating shaft and the impeller rotate simultaneously, the gas enters the radial passage from the air inlet into the air inlet box, and the gas entering the inlet channel enters the axial passage through the outlet of the inlet box, and finally passes through the impeller. The air outlet flows out. Since the inner side of the bottom of the air inlet box is provided with a baffle and two chambers are formed, the gas entering the air inlet box will be separated by the deflector at the bottom of the air inlet box, and two rotating directions will be formed between the two chambers. The vortex pair disperses the gas at the bottom of the inlet box, which improves the uniformity of the flow of the gas at the outlet of the inlet box, so that the gas does not accumulate in the bottom of the inlet box and causes a flow disorder.

The present invention provides a wind conveying apparatus comprising a curved pipe and the above-described fan, which have all the advantages of a wind turbine.

DRAWINGS

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the embodiments will be briefly described below. It should be understood that the following drawings show only certain embodiments of the present invention, and therefore It should be seen as a limitation on the scope, and those skilled in the art can obtain other related drawings according to these drawings without any creative work.

1 is a process view of a first angle of view of gas flow inside a wind inlet box of a prior art fan;

2 is a process view of a second angle of view of gas flow inside a wind inlet box of a prior art fan;

3 is a process diagram of gas flow in a fan in the prior art;

Figure 4 is a cross-sectional view of a fan provided in Embodiment 1 of the present invention;

Figure 5 is a schematic structural view of the current collector shown in Figure 4;

6 is a schematic structural view of a fan provided in Embodiment 1 of the present invention;

Figure 7 is a schematic structural view of the first perspective view of the air inlet box shown in Figure 4;

Figure 8 is a schematic view showing the structure of the second perspective view of the air inlet box shown in Figure 4;

Figure 9 is a schematic structural view of the deflector shown in Figure 7;

10 is a process diagram of a first angle of view of gas flow inside a wind inlet box of a fan according to Embodiment 1 of the present invention;

Figure 11 is a process view showing a second angle of view of gas flow inside the air inlet box of the fan provided in Embodiment 1 of the present invention.

12 is a partial enlarged view of a wind inlet box of a fan according to Embodiment 2 of the present invention;

13 is a schematic structural view of a wind inlet box of a fan according to Embodiment 2 of the present invention;

FIG. 14 is a schematic structural diagram of an air conveying device according to Embodiment 3 of the present invention.

Icon: 100-fan; 10-shell; 11-current collector; 111-axial channel; 12-volute; 121-air outlet; 13-flow channel; 20-wind inlet; 21-air inlet; - radial passage; 23-case; 231-first panel; 232-first side panel; 2321-third panel; 2322-fourth panel; 2323-second transition line; 233-second panel; 2331 - first plate body; 2332 - second plate body; 2233 - first transition line; 234 - second side plate; 2341 - fifth plate body; 2342 - sixth plate body; 2343 - third transition line; - bottom plate; 25 - outlet; 26 - first chamber; 27 - second chamber; 28 - chute; 30 - baffle; 31 - first side; 32 - second side; Edge; 34-fourth edge; 35-projection; 36-push; 40-rotor; 50-impeller; 51-vortex; 60-first direction; 200-air supply device;

Detailed ways

In the prior art, as shown in FIG. 1, a part of the rotating shaft 40 extends to the inside of the air inlet box 20, and a stable laminar flow before the gas enters the air inlet box 20 to reach the rotating shaft 40. Since the rotating shaft 40 is rotating, the gas reaches the rotating shaft 40. The rotation of the shaft 40 will affect the steady flow of the gas. It is assumed that the rotation direction of the rotating shaft 40 is the first direction 60, and the first direction 60 is the counterclockwise direction. The flow direction of the gas on the left side of the rotating shaft 40 will coincide with the moving direction of the surface of the rotating shaft 40, and the left side of the rotating shaft 40 due to the adhesion of the gas. The gas will accelerate the flow and adhere to the surface of the rotating shaft 40 to flow to the lower right of the intake box 20. On the other hand, the gas flow direction on the right side of the rotary shaft 40 is opposite to the surface movement direction of the rotary shaft 40, and the gas is separated from the flow on the right side of the rotary shaft 40 by the viscous action of the gas. Therefore, under the action of the gas on both sides of the rotating shaft 40, a vortex 51 is generated on the right side of the bottom of the inlet casing 20, and the normal direction of the vortex 51 coincides with the axial direction of the rotating shaft 40, and the position of the vortex 51 and the vortex 51 The amount of the gas has a large influence on the distribution of the cross-section mass and velocity of the gas at the outlet 25 of the inlet box 20, resulting in uneven flow of gas flowing out of the outlet 25 of the inlet box 20. At the same time, as shown in FIG. 2, when a large amount of gas flows to the bottom side of the inlet box 20, the pressure is increased at this point, so that the bottom of the inlet box 20 will generate another vortex 51, the normal direction and the axis of the vortex 51. The axis direction of 40 is perpendicular, and the vortex 51 further disturbs the gas, destroying the flow environment of the cross section of the outlet 25 of the inlet box 20, resulting in a decrease in the overall efficiency of the fan 100.

In the prior art, as shown in FIG. 3, during the flow of the gas inside the fan 100, the gas flows from the radial passage 22 inside the inlet box 20 into the axial passage 111 inside the casing 10, ideally, the gas enters. The flow direction after the passage into the axial passage 111 is axial and is evenly distributed in the axial passage 111. Due to the gravity of the gas and the inertia of the gas, the gas entering the axial passage 111 will flow to the lower half of the axial passage 111, and the upper half of the axial passage 111 will have flow separation, reducing the efficiency of the blower 100. .

In combination with the above disadvantages of the prior art, the present invention provides a fan 100 and a wind transmission device 200.

The technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the drawings in the embodiments of the present invention. It is a partial embodiment of the invention, and not all of the embodiments. The components of the embodiments of the invention, which are generally described and illustrated in the figures herein, may be arranged and designed in various different configurations.

Therefore, the following detailed description of the embodiments of the invention in the claims All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

It should be noted that the embodiments in the present invention and the features in the embodiments may be combined with each other without conflict.

It should be noted that similar reference numerals and letters indicate similar items in the following figures. Therefore, once an item is defined in one figure, it is not necessary to further define and explain it in the subsequent figures.

In the description of the embodiments of the present invention, it should be noted that the indication orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship that is conventionally placed when the invention product is used, or The orientation or positional relationship that is commonly understood by those skilled in the art, or the orientation or positional relationship that is conventionally placed when the invention product is used, is merely for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or component referred to must be It is to be understood that the invention is not limited by the specific orientation and construction and operation. Moreover, the terms "first", "second", "third", and the like are used merely to distinguish a description, and are not to be construed as indicating or implying a relative importance.

In the description of the embodiments of the present invention, it should be further noted that the terms “setting” and “connecting” should be understood broadly, and may be a fixed connection or a detachable connection, unless explicitly stated and defined otherwise. Or connected in one piece; it can be a direct connection or an indirect connection through an intermediate medium. The specific meaning of the above terms in the present invention can be understood in a specific case by those skilled in the art.

Example 1

As shown in FIG. 4 , the present embodiment provides a fan 100 including a housing 10 , an air inlet box 20 , a baffle 30 , a rotating shaft 40 , and an impeller 50 . The air inlet box 20 is fixed to the outer side of the housing 10 , and the impeller 50 is disposed on the outer side. On the outer side of the rotating shaft 40, the impeller 50 is located in the casing 10, and the rotating shaft 40 is rotatably supported by the air inlet box 20, and the deflector 30 is disposed in the air inlet box 20.

Specifically, the housing 10 includes a current collector 11 and a volute 12, and the current collector 11 is two, and the two current collectors 11 are symmetrically disposed in the volute 12.

As shown in FIG. 5, the current collector 11 is a rotary body, and an axial passage 111 is formed inside the current collector 11. The current collector 11 is flared.

As shown in FIG. 6, the volute 12 has a spiral shape, which is a hollow structure, and the volute 12 is provided with an air outlet 121.

As shown in FIG. 4, two current collectors 11 are fixed in the volute 12, two current collectors 11 are arranged between the two, and the outer wall of the current collector 11 and the inner wall of the volute 12 form a flow guiding passage 13 and an air outlet. 121 is in communication with the flow guiding channel 13.

As shown in FIG. 7 and FIG. 8 , the top of the air inlet box 20 is provided with an air inlet 21, and the air inlet box 20 is internally provided with a radial passage 22, and the air inlet 21 is connected with the radial passage 22; the side wall of the air inlet box 20 is provided The outlet 25 is in communication with the radial passage 22.

The air inlet box 20 includes a box body 23 and a bottom plate 24, and the bottom plate 24 is provided at the bottom of the box body 23. The box body 23 includes a first panel 231, a first side panel 232, a second panel 233, and a second side panel 234. The first panel 231 is opposite to the second panel 233, and the first side panel 232 is The second side plates 234 are oppositely disposed. As shown in FIG. 8, the first panel 231 is vertically arranged, and the first panel 231 is provided with an outlet 25, and the outlet 25 is a circular through hole. The second panel 233 is obliquely arranged. The second panel 233 includes a first plate body 2331 and a second plate body 2332 arranged in this order. The top end of the second plate body 2332 is connected to the bottom end of the first plate body 2331, and the bottom end of the second plate body 2332 is connected to the bottom plate 24. The second plate body 2332 is connected to the first plate body 2331 to form a first transition line 2333. The first plate body 2331 is obliquely disposed, and the distance from the top end of the first plate body 2331 to the first panel 231 is greater than the distance from the bottom end of the first plate body 2331 to the first panel 231; the second plate body 2332 is obliquely disposed, the second plate The distance from the top end of the body 2332 to the first panel 231 is greater than the distance from the bottom end of the second board 2332 to the first panel 231. As shown in FIG. 7, the first side plate 232 is disposed obliquely with respect to the second side plate 234. The first side plate 232 includes a third plate body 2321 and a fourth plate body 2322, and the third plate body 2321 and the fourth plate body 2322 are both The top end of the fourth board body 2322 is connected to the bottom end of the third board body 2321, the bottom end of the fourth board body 2322 is connected to the bottom board 24, and the third board body 2321 is connected to the fourth board body 2322. A second transition line 2323 is formed. The second side plate 234 includes a fifth plate body 2341 and a sixth plate body 2342. The fifth plate body 2341 and the sixth plate body 2342 are both perpendicular to the first panel 231 and the sixth plate body 2342. The top end is connected to the bottom end of the fifth plate body 2341, the bottom end of the sixth plate body 2342 is connected to the bottom plate 24, and the third plate body 2341 and the sixth plate body 2342 are joined to form a third transition line 2343. The third plate body 2321 corresponds to the fifth plate body 2341, and the third plate body 2321 and the fifth plate body 2341 are both disposed obliquely. The two ends of the third plate body 2321 in the height direction and the height direction of the fifth plate body 2341 The upper ends are flush, and the distance between the top end of the third plate body 2321 and the top end of the fifth plate body 2341 is greater than the distance between the bottom end of the third plate body 2321 and the bottom end of the fifth plate body 2341; the fourth plate body 2322 and Corresponding to the sixth plate body 2342, the fourth plate body 2322 and the sixth plate body 2342 are both inclined, and the two ends of the fourth plate body 2322 in the height direction are flush with the two ends of the sixth plate body 2342 in the height direction. The distance between the top end of the fourth plate body 2322 and the top end of the sixth plate body 2342 is greater than the distance between the bottom end of the fourth plate body 2322 and the bottom end of the sixth plate body 2342, that is, the fourth plate body 2322 is closer to the third plate body 2321. The direction of the second side plate 234 is inclined, and the sixth plate body 2342 is inclined toward the first side plate 232 with respect to the fifth plate body 2341. The first transition line 2333, the second transition line 2323, and the third transition line 2343 are all located in the same horizontal plane.

As shown in FIG. 9, the baffle 30 has a quadrangular shape, and the baffle 30 has four sides, which are a first side portion 31, a second side portion 32, a third side portion 33, and a fourth side portion 34, respectively. The one side portion 31, the second side portion 32, the third side portion 33, and the fourth side portion 34 are sequentially connected to form a closed portion. The first side portion 31 is parallel to the third side portion 33, and the first side portion 31 and the third side portion 33 are both horizontally arranged, the second side portion 32 is vertically arranged, and the fourth side portion 34 is obliquely arranged. As shown in FIG. 8, the baffle 30 is disposed at the bottom of the air inlet box 20, the baffle 30 is vertically disposed in the radial passage 22, and the second side portion 32 is attached and fixed to the inner surface of the first panel 231, and the third The side portion 33 is attached and fixed to the inner surface of the bottom plate 24, and the fourth side portion 34 is attached and fixed to the inner surface of the second plate body 2332 of the second panel 233. As shown in FIG. 7, after the deflector 30 is disposed on the inner side of the bottom of the air inlet box 20, the axis of the outlet 25 is parallel to the plane of the deflector 30, and the deflector 30 is perpendicular to the first panel 231, at the bottom of the wind inlet box 20. The inner side forms two chambers, a first chamber 26 and a second chamber 27, respectively. The first panel 231, the baffle 30, the second plate 2332, and the fourth plate 2322 collectively define a first chamber 26, a first panel 231, a baffle 30, a second plate 2332, and a sixth plate 2342. The second chamber 27 is defined together. The deflector 30 is adjacent to the second side panel 234, that is, the point at any point on the second side panel 234 to the deflector 30 is smaller than the point corresponding to the point on the first side panel 232 and the second side panel 234. The distance of the flow plate 30 is such that the first chamber 26 is larger than the second chamber 27.

The rotating shaft 40 and the impeller 50 are prior art, and the structure of both is not described in detail herein.

As shown in FIG. 4, the rotating shaft 40 is located in the axial passage 111 of the current collector 11, the rotating shaft 40 is disposed at the center of the current collector 11, the impeller 50 is fixed to the outer side of the rotating shaft 40, and the impeller 50 is located in the volute 12, and the impeller 50 Located between the two current collectors 11, the axial passages 111 of the two current collectors 11 communicate with the flow guiding passages 13 through the impellers 50. There are two inlet boxes 20, and the inlet box 20 is in one-to-one correspondence with the collectors 11. The two inlet ducts 20 are symmetrically distributed on both sides of the casing 10 in the axial direction of the rotating shaft 40. Of course, the baffles 30 are provided on the inner side of the bottom of each of the inlet ducts 20. One end of the rotating shaft 40 is rotatably supported by the second panel 233 through an outlet 25 on the first panel 231 of the air inlet box 20, and a portion of the rotating shaft 40 extends in the radial passage 22 of the air inlet box 20; the other end of the rotating shaft 40 is worn. The outlet 25 on the first panel 231 of the other inlet box 20 is rotatably supported by the second panel 233, and a portion of the shaft 40 extends within the radial passage 22 of the inlet box 20. The axis of the rotating shaft 40 coincides with the axis of the outlet 25, and the air inlet box 20 is vertically arranged, and the deflector 30 is vertically disposed in the air inlet box 20, and the axis of the rotating shaft 40 is parallel to the plane in which the deflector 30 is located. The first panel 231 of the air inlet box 20 is fixed to the volute 12, and one end of the current collector 11 extends to the outlet 25 on the first panel 231, the radial passage 22 in the inlet box 20 and the axial direction in the current collector 11 The passage 111 communicates through an outlet 25 on the first panel 231.

In use, the shaft 40 and the impeller 50 rotate simultaneously, and the gas enters the radial passage 22 inside the inlet box 20 from the air inlet 21, and the gas will flow in the radial direction of the shaft 40 substantially in the radial direction; into the radial passage 22 The gas enters the axial passage 111 through the outlet 25 of the inlet box 20, and the gas will flow substantially in the axial direction of the shaft 40 in the axial passage 111; then, under the action of the rotation of the impeller 50, the gas in the axial passage 111 passes. The impeller 50 enters into the flow guiding passage 13 between the current collector 11 and the volute 12, and finally flows out from the air outlet 121.

As shown in FIG. 10, since the deflector 30 is provided on the inner side of the bottom of the inlet box 20, and two chambers are formed, the gas entering the inlet box 20 will be divided by the deflector 30 at the bottom of the inlet box 20, two Two pairs of vortices 51 having opposite directions of rotation will be formed in the chambers. The normal directions of the two vortices 51 are the same as the axial direction of the rotating shaft 40, so that the gas is dispersed at the bottom of the inlet box 20, and the gas is increased in the inlet box. The uniformity of the flow of the outlet 25 is such that the gas does not accumulate on the side of the bottom of the inlet box 20, causing a flow disturbance. In addition, as shown in FIG. 11, after the gas is dispersed at the bottom of the inlet box 20, the pressure gradient is reduced, and the vortex 51 in the normal direction perpendicular to the axis of the rotating shaft 40 is eliminated, thereby reducing the gas in the inlet box. 20 internal flow losses. In addition, as shown in FIG. 10, since the first chamber 26 is larger than the second chamber 27, the position of the vortex 51 formed in the first chamber 26 will be lower than the position of the vortex 51 formed in the second chamber 27. The upper vortex 51 drives more gas into the upper portion of the rotating shaft 40 (the upper half of the axial passage 111), and the lower vortex 51 drives more gas into the lower portion of the rotating shaft 40 (the lower half of the axial passage 111) Part), to minimize the difference in mass and flow distribution of gas flowing in the upper and lower halves of the axial passage 111.

In this embodiment, the first panel 231 is disposed obliquely with respect to the second panel 233 such that the top cross-sectional area of the inlet box 20 is larger than the cross-sectional area of the bottom of the inlet box 20, so that the flow rate of the gas flowing through the bottom of the inlet box 20 is increased, thereby increasing The Reynolds coefficient increases the uniformity of the velocity of the gas flowing through the outlet 25 of the inlet box 20. In addition, the second plate body 2332 in the second panel 233 is further inclined with respect to the first plate body 2331, so that the gas flows in an advantageous direction under the action of the second plate body 2332, the gas flow loss is reduced, and the impeller 50 is added to function. Force, thereby increasing the efficiency of the fan 100. The inclination of the first side plate 232 relative to the second side plate 234 can further increase the uniformity of the gas velocity flowing through the outlet 25 of the inlet box 20, and the fourth plate 2322 of the first side plate 232 is further extended relative to the third plate 2321. Tilting, the sixth plate 2342 in the second side plate 234 is further inclined relative to the fifth plate 2341 to further reduce the loss of gas flow.

In this embodiment, the second panel 233 is composed of a first plate body 2331 and a second plate body 2332. In other specific embodiments, the first plate body 2331 may also be a complete slant plate.

In this embodiment, the first side plate 232 is composed of a third plate body 2321 and a fourth plate body 2322. The second side plate 234 is composed of a fifth plate body 2341 and a sixth plate body 2342. In other specific embodiments, The first plate 2331 and the second plate 2332 can each be a complete slant plate.

Example 2

The present embodiment provides a fan 100, which differs from the above embodiment in that the baffle 30 is connected to the air inlet box 20 in a different manner.

In this embodiment, the deflector 30 is slidably coupled to the air inlet box 20.

Specifically, as shown in FIG. 12, the second side portion 32 and the fourth side portion 34 of the baffle 30 are respectively provided with a protruding portion 35, the second plate body 2332 of the second panel 233 and the first panel 231. The sliding portion 28 is disposed on the sliding groove 28 of the first side plate 231, and the protruding portion 35 of the fourth side portion 34 is disposed on the second plate body 2332. Inside the chute 28. As shown in FIG. 13, a push rod 36 is fixed on the baffle 30. The free end of the push rod 36 passes through the fourth plate 2322 of the first side plate 232 and is located outside the air inlet box 20, and the push rod 36 and the fourth board The body 2322 is slidingly sealed.

In actual operation, the size of the first chamber 26 and the second chamber 27 may be changed by pushing the push rod 36 to slide the deflector 30 relative to the intake box 20 to change the formation in the first chamber 26. The height of the vortex 51 formed in the vortex 51 and the second chamber 27. By adjusting the position of the baffle 30, the uniformity of gas mass, flow rate and velocity distribution across the outlet 25 of the inlet box 20 can be optimized.

The rest of the structure of this embodiment is the same as that of Embodiment 1, and details are not described herein again.

Example 3

As shown in FIG. 14 , the present embodiment provides an air supply device 200 including an elbow 210 and a fan 100 in the embodiment. The elbow 210 is connected to the air inlet 21 of the air inlet box 20, and the elbow 210 and the air inlet box 20 are provided. The inner radial passage 22 is in communication. The air inlet box 20 in the fan 100 can improve the flow of gas entering the elbow 210, making the gas entering the axial passage 111 from the outlet 25 of the inlet box 20 more uniform.

The above are only the preferred embodiments of the present invention, and are not intended to limit the present invention, and various modifications and changes can be made to the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and scope of the present invention are intended to be included within the scope of the present invention.

Claims

A fan, comprising: a casing, a wind inlet box, a rotating shaft, an impeller and a baffle;

An axial passage is formed inside the casing, and an air outlet is disposed on the casing, and the air outlet is connected to the axial passage through the impeller;

The air inlet box is fixed to the outer side of the casing, the air inlet box forms a radial passage inside, and the top of the air inlet box is provided with an air inlet port communicating with the radial passage, and the side wall of the air inlet box is provided An outlet, the radial passage communicating with the axial passage through the outlet;

The rotating shaft is rotatably supported by the air inlet box, the rotating shaft is located in the axial passage, and the rotating shaft extends into the radial passage;

The impeller is disposed outside the rotating shaft, and the impeller is located in the housing;

The baffle is disposed at a bottom of the air inlet box, and the baffle is disposed in the radial passage such that two inner chambers are formed inside the bottom of the air inlet box.
The fan according to claim 1, wherein the baffle is fixedly connected to the air inlet box, and the two chambers are a first chamber and a second chamber, respectively, the first chamber Greater than the second chamber.
The fan according to claim 1, wherein the baffle is slidably connected to the air inlet box, and the two chambers are respectively a first chamber and a second chamber, and the deflector is opposite The air box sliding can change the size of the first chamber and the second chamber.
The fan according to claim 1, wherein the air inlet case and the bottom plate are disposed at a bottom of the case, and the case comprises a first panel, a first side plate, and a first end a second panel and a second side panel, the first panel is fixed to the housing, the outlet is disposed on the first panel, and the second panel is disposed obliquely with respect to the first panel, the first The distance between the top end of the panel and the top end of the second panel is greater than the distance between the bottom end of the first panel and the bottom end of the second panel.
The fan according to claim 4, wherein the second panel comprises a first plate body and a second plate body arranged up and down, a top end of the second plate body and a bottom end of the first plate body Connecting, the bottom end of the second plate body is connected to the bottom plate;

The distance from the top end of the first board to the first panel is greater than the distance from the bottom end of the first board to the first panel; the distance from the top end of the second board to the first panel is greater than the The distance from the bottom end of the second plate to the first panel.
The fan according to claim 5, wherein the first side plate is disposed obliquely with respect to the second side plate, and a distance between a top end of the first side plate and a top end of the second side plate is greater than the first The distance between the bottom end of the side panel and the bottom end of the second side panel.
The fan according to claim 1, wherein an axis of the rotating shaft is parallel to a plane in which the deflector is located.
The fan according to claim 4, wherein the inlet box is vertically disposed to an outer side of the casing, and the baffle is vertically disposed within the radial passage.
The fan according to claim 1, wherein the inlet ducts are two, and the two inlet ducts are symmetrically distributed on both sides of the casing in the axial direction of the rotating shaft.
An air supply device, comprising: a curved pipe and the fan according to any one of claims 1-9, wherein the elbow is connected to an air inlet of the air inlet box.